Materials, Pressure - temperature, Installations – Watts LF800M4QT User Manual
Page 2: Dimensions – weights, Standards, Approvals, Freeze protection guidelines, Notice
Materials
Springs:
Stainless Steel
Bonnet:
Celcon
®
Vent Disc:
Silicone Rubber
Disc Holder Float: Polypropylene
Check Valve Disc: Silicone Rubber
Check Valve Seat: Noryl
®
Plastic
Body:
Lead Free* Cast Copper Silicon Alloy
Pressure - Temperature
Temperature Range: 33°F to 140° (0.5°C to 60°C)
Maximum Working Pressure: 150psi (10.3 bar)
Installations
This valve is designed for installation in a continuous pressure
potable water supply system 12" above the highest point of the
downstream piping. The valve must be installed with the supply
connected to the bottom and in a vertical position. Allow adequate
space for periodic inspection, servicing or testing. The valve should
not be installed in an area where freezing or spillage will cause dam-
age. Adequate drainage/freeze protection must be provided in cold
weather applications. 1.5psi (10 kPa) must be exerted against the
float spring to seal the float and air inlet. Do not undersize supply
and discharge piping.
Vacuum breakers are not designed, tested or
approved to protect against backpressure backflow or water hammer
shock. For protection against backpressure backflow, install Watts
LF009 Reduced Pressure Zone Backflow Preventer. For protec-
tion against water hammer shock install a Watts Series LF15 Water
Hammer Arrestor utilizing good plumbing practice.
Dimensions – Weights
LF800M4QT
Standards
ANSI, USC Manual Section 10
Approvals
Approved by the foundation for Cross-Connection Control and
Hydraulic Research at the University of Southern California, Manual
Section 10.
1
⁄
2
",
3
⁄
4
", 1
1
⁄
4
", 1
1
⁄
2
", 2" (15, 20, 32, 40, 50mm)
1" (25mm) pending
CSA
1
⁄
2
" – 2" (15 - 50mm)
D
C
E
A
G
B
Freeze Protection Guidelines
1. Close main shutoff valve.
2. Open upstream drain, test cocks and isolation ball
valves to depressurize line.
3. Purge with air.
4. Leave test cocks and isolation ball valve handles in 45° angle to
drain ball valves and prevent casting damage.
45°
Union
Outlet Drain
Valve
Flow
Inlet Drain
Main Shutoff Valve
12" (300mm)
Minimum
clearance
above the
highest point
of down-
stream
piping.
1020
Noryl
®
is a registered trademark of SABIC Innovative Plastics Holding BV.
Celcon
®
is a registered trademark of Celanese Corporation.
moDEl
SizE (DN)
DimENSioNS
WEiGht
A
B
C
D
E
G
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
lbs.
kg.
LF800M4QT
1
⁄
2
15
6
1
⁄
8
156
6
1
⁄
4
159
2
9
⁄
16
65
3
11
⁄
16
94
3
7
⁄
8
98
2
1
⁄
4
57
4
1.8
LF800M4QT
3
⁄
4
20
6
1
⁄
2
165
6
1
⁄
2
165
2
9
⁄
16
65
3
15
⁄
16
100
4
1
⁄
8
105
2
1
⁄
4
57
4
1.8
LF800M4QT
1
25
7
1
⁄
2
191
7
1
⁄
2
191
2
3
⁄
4
70
4
3
⁄
4
121
4
7
⁄
8
124
3
7
⁄
16
87
6
2.7
LF800M4QT
1
1
⁄
4
32
8
7
⁄
8
225
9
229
3
1
⁄
4
83
5
3
⁄
4
146
6
1
⁄
8
156
5
127
11
5.0
LF800M4QT
1
1
⁄
2
40
9
1
⁄
4
235
9
1
⁄
2
241
3
1
⁄
4
83
6
1
⁄
4
159
6
3
⁄
8
162
5
127
14
6.3
LF800M4QT
2
50
10
5
⁄
8
270
9
5
⁄
8
245
3
1
⁄
4
83
6
3
⁄
8
162
7
178
5
127
19
8.6
NOTICE